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From: [e-mail] (Steve Phillips)
Subject: FAQ: Comp.lang.verilog Frequently Asked Questions (with answers)
Message-ID: <[e-mail]>
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Summary: This posting contains a list of Frequently Asked Questions (and
         their answers) about Verilog HDL.
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Archive-name: verilog-faq
Version $Id: verilog-faq.html,v 2.15 1995/06/20 16:48:25 sjp Exp sjp $

   This is the FAQ (Frequently Asked Questions) list for the newsgroup
   comp.lang.verilog. It is an attempt to gather in one place the answers
   to common questions and to maintain an updated list of publications,
   services, and products. Please read this document before posting.

   This article is posted bi-weekly. It is also available from the
   archive for this group.

   If you haven't already done so, reading the posts on
   news.announce.newusers titled "A Primer on How Work With the Usenet
   Community", "Answers to Frequently Asked Questions about Usenet" and
   "Hints on writing style for Usenet" would be a good idea. They are "a
   guide to using it [Usenet] politely, effectively and efficiently."

   Your comments, additions, and corrections to this list are welcome:
   Please send them to Steve Phillips <[e-mail]>.

P01: Table of Contents

    Legend

          + new
          - deleted
          ! changed

    Preface
       P01: Table of Contents
       P02: Viewing this article
       P03: ! Where to get the most recent version of this FAQ
       P04: How does FTP work?

    Introductory
       I01: What is Verilog?
       I02: Who's bright idea was this? (A short history)
       I03: What is comp.lang.verilog?
       I04: Is there an archive for this group?
       I05: Is the archive available on the Web, through clients like
       Mosaic and Lynx?

    General Topics
       G01: Is there a verilog.el for GNU emacs?
       G02: What is PLI?
       G03: Is there a version that runs on a IBM PC clone?
       G04: What is the best PC clone simulator?
       G05: What is the best workstation simulator?
       G06: Is there a vgrind def file?
       G07: Is there a free verilog parser available?
       G08: Is there a free Verilog simulator?
       G09: Is there a Verilog test suite?
       G10: Where can I find a free Verilog quick reference card?
       G11: Are there related Web sites?

    Appendixes
       A01: Verilog vendors and products
       A02: Books and Reference material on Verilog



Subject: P02: Viewing this article

   This article is now written as an HTML document. The plain text
   version is generated by dump the HTML with lynx. This means that it is
   no longer in digest format. This makes it a little less useable as a
   plain text document, but a lot nicer as a web ducument.

   To skip to a particular question numbered xxx, use "/xxx" with most
   pagers. In GNU Emacs type "M-C-s xxx", (or C-r to search backwards),
   followed by ESC to end the search.

Subject: P03: Where to get the most recent version of this FAQ

   This FAQ is now available from the usual places:

   o RTFM FAQ archives
       ftp://rtfm.mit.edu/pub/usenet-by-group/comp.lang.verilog/FAQ:_Comp
       .lang.verilog_Frequently_Asked_Questions_(with_answers)

   o Ohio State Usenet FAQ archives
       http://www.cis.ohio-state.edu/hypertext/faq/usenet/verilog-faq/faq
       .html



   It is also posted frequently to comp.lang.verilog, and is available
   from the archive site (see I04: Is there an archive for this group? ).


Subject: P04: How does FTP work?

   FTP is a way of copying files between networked computers. If you need
   help in using or getting started with FTP, send e-mail to

   [e-mail]



   with

   send /pub/usenet-by-group/news.answers/ftp-list/faq

   in the body.

Subject: I01: What is Verilog?

   Verilog HDL is a hardware description language used to design and
   document electronic systems. Verilog HDL allows designers to design at
   various levels of abstraction. It is the most widely used HDL with a
   user community of more than 15000 active designers.

Subject: I02: Who's bright idea was this? (A short history)

   [contributed by Asad Khan <[e-mail]> ]

   Verilog HDL originated circa 1983 at Gateway Design Automation, which
   was then located in Acton, MA. The company was privately held at that
   time by Dr. Prabhakar Goel, the inventor of the PODEM test generation
   algorithm. Verilog HDL was designed by Phil Moorby, who was later to
   become the Chief Designer for Verilog-XL and the first Corporate
   Fellow at Cadence Design Systems.

   Moorby built a simulator around Verilog-XL in 1984-85, and then went
   on to make his second major contribution at GDA, viz. the XL algorithm
   for every fast gate-level simulation, which was first productized in
   1986.

   Gateway Design Automation grew rapidly with the success of Verilog-XL
   and was finally acquired by Cadence Design Systems, San Jose, CA in
   1989. Up till this time, Verilog HDL was still a proprietary language,
   being the property of Cadence Design Systems.

   Cadence Design Systems decided to open the language to the public in
   1990, and thus OVI was born.

   [contributed by John Sanguinetti <[e-mail]> ]

   When OVI was formed in 1991, a number of small companies began working
   on Verilog simulators. The first of these came to market in 1992, and
   now there are mature Verilog simulators available from several souces.


   As a result, the Verilog market has grown substantially. The market
   for Verilog-related tools in 1994 was well over $75m, making it the
   most commercially significant hardware description language on the
   market.

   Verilog is now in the process of being standardized by the IEEE. There
   is an IEEE working group established under the Design Automation
   Sub-Committee which was established in 1993 to produce the IEEE
   Verilog standard 1364. This working group is currently active and
   expects to produce a draft standard for balloting sometime in 1995.

Subject: I03: What is comp.lang.verilog?

   [extracted from ftp.uu.net:/usenet/control/comp/comp.lang.verilog.Z]

   comp.lang.verilog is an unmoderated newsgroup which passed its vote
   for creation by 332:9 as reported in news.announce.newgroups on 12 Dec
   1991.

   For your newsgroups file:
   comp.lang.verilog Discussing Verilog and PLI.

   The charter, culled from the call for votes:

   The USENET group is intended at providing a forum for the discussion
   of topics specific to Verilog, PLI (programming language interface),
   SDF (Standard delay file format), Synthesis guidelines, compliance and
   Verilog modeling. It will also provide users with an ability to share
   Verilog/PLI utilities. Users can also use the forum to discuss any
   Verilog related issues proposed by Open Verilog International and its
   organizational and technical committees.

Subject: I04: Is there an archive for this group?

   Yes. Out of the goodness of our hearts, we here at Cray Research
   provide an anonymous ftp archive for the postings to comp.lang.verilog
   and related files and information. This archive is read only; Cray
   does not allow non-employees to write into its file systems. If you
   have something to contribute, send it to me ([e-mail]) and I will
   upload it.

   ftp.cray.com:/pub/comp.lang.verilog/

   In addition, the University of Windsor maintains an archive of
   postings to several of the CAD related newsgroups. One of these is
   comp.lang.verilog:

   ftp.cs.uwindsor.ca:/pub/local/vlsi/comp.lang.verilog/



Subject: I05: Is the archive available on the Web, through clients like Mosaic
and Lynx?

   Cray also provides space on the Cray Research Web Server for the
   Comp.lang.verilog home page:

   http://www.cray.com/verilog/archive.html

   In fact, this FAQ is actually a html document. The text version is
   created by dumping the html version with lynx. The html version can be
   accessed from the archive home page, or directly at:

   http://www.cray.com/verilog/verilog-faq.html



Subject: G01: Is there a verilog.el for GNU emacs?

   The archives contain no less than three verilog modes for emacs:

   ftp.cray.com:/pub/comp.lang.verilog/verilog.el.Z
       Rick Eversole at Cadence maintains a verilog mode and occasionally
       posts it to comp.lang.verilog. At this time it supports only FSF
       18.xx and Epoch. FSF 19.xx and Lucid Emacs (lemacs) are not
       supported. It is available at the archive site, or send email to
       [e-mail] to request a copy if you have missed the
       posting and can not get it from the archive of comp.lang.verilog.

   ftp.cray.com:/pub/comp.lang.verilog/verilog-mode.Z
       This one was written by Michael McNamara ([e-mail]). I
       grabbed this off the net last fall.

   ftp.cray.com:/pub/comp.lang.verilog/vlog-mode.tar.Z
       This one was written by Phil Welling ([e-mail]) and
       was also grabbed from a posting.

   In addition, Cadence is now shipping an LSE (Language Sensitive
   Editor) that appears to consist of Lucid Emacs with a set of elisp
   files to implement the verilog mode.

Subject: G02: What is PLI?

   PLI stands for Programming Language Interface. The PLI consists of an
   interface mechanism, a set of routines to interact with the simulation
   environment, and a set of routines to access the Verilog internal data
   structures. These allow user supplied C code to interact dynamically
   with the simulation and data structures.

Subject: G03: Is there a version that runs on a IBM PC clone?

   See section A01: Verilog vendors and products

Subject: G04: What is the best PC clone simulator?

   The answer, of coarse, depends on what you are looking for. However,
   Yatin Trivedi has made available a summary of an evaluation of the PC
   clone verilog simulators currently available:


        Here is the summary of the PC_based Verilog simulator
        Product Evaluation results. These results and a discussion
        of the evaluation appeared in ASIC & EDA Magazine, (Product
        Evaluation, PC based Verilog Simulators, April 1994,
        pages 12-36), and Electronic Engineering Times (Verilog
        Simulators get benchmark grilling, April 25, Page 114).

        A detailed report of raw performance numbers and the
        scoring schemes are available in a report from Seva
        Technologies (510-249-9085 or 408-223-1231).

        The evaluation was ranked using SEVA Evaluation Index (SEI)
        derived by talking with more than 50 different users.

        SEI Criteria    Weight
        ============    ======

        Performance     40%
        Debugging       20%
         Environment
        Language        15%
         Compliance
        Design Envr     10%
         Integration
        Tech Doc &       5%
         Support
        PLI Implem       4%
        Specify Block    4%
        Installation     2%
         & Licensing


        Performance was measured in terms of compile time, run time,
        and memory used.

        There were 9 different models run with small, medium, and
        large number of vectors.

        The 9 models were divided in small, medium, and large models
        at gate level, RTL, and mixed.

        More than 125 compliance test cases were run.

        Run time was at least 3 minutes for the fastest simulator
        to avoid any measurement inaccuracies.

        Simulator/Vendor        SEI Score       SEI/$1,000
        ================        =========       ==========

        VeriBest/Intergraph     73.9             4.93
        FinSim/Fintronic        63.7             9.10
        SILOS III/Simucad       62.3            20.77
        Baseline/Frontline      61.9            10.32
        Veriwell/Wellspring     29.7            29.85
        Viper/InterHDL          25.9            26.03

        Seva EValuation Academy Awards 1994 (SEVA Awards) goes to
        (drum rolls, please...)

        Serious User's Simulators       ==>     VeriBest, Silos III, Baseline
        Best Price/Performance          ==>     Silos III, Baseline
        Cost-conscious User's choice    ==>     Veriwell, Viper
        Best Performance                ==>     VeriBest, Silos III
        Most Compliant                  ==>     Baseline, VeriBest
        Best Documentation              ==>     Baseline, Silos III
        Macintosh Compatibility         ==>     Veriwell

        Note: VeriBest uses Finsim as its core simulator.


        We hope this was a useful evaluation. The detailed report
        is published for EDA managers who wish to make an informed
        decision of purchasing large quantity of simulators for
        their companies. Most individual users are better off just
        buying the simulator from the above information rather
        than spending $3,000 for the report.

        If you happen to quote the information from this posting,
        we request you to maintain the integrity of the information
        in tact, and credit Seva Technologies as the source.

        A VHDL simulator evaluation is near completion, and FPGA based
        synthesis tools evaluation is planned for.

        If you care to voice your opinion, we would like to know what
        you thought of SEI criteria and weights for Verilog simulators
        (VHDL are similar, and will be published in July issue of
        ASIC & EDA magazine).

        The designs we used for performance measurements were received
        from REAL users under NDA, and most are in production. If you
        would like your design to be part of a comprehensive evaluation
        process, we would certainly welcome your participation.

        Please read the articles in ASIC & EDA and EETimes.

        Thank you for your interest. We look forward to your comments
        directly by email to [e-mail], [e-mail], and
        [e-mail].

        If you are in Europe, you may contact Mr. Jon Howes, NEuW, for
        the availability of the report. His coordinates are:

        Jon C Howes    [e-mail]  CIS: 100120,2101 Japan:SGS0220
1
        NEuW Limited, PO Box 8, Greenfield Innovation Centre,Greenfield,Oldham,
        OL3 7LZ, UK  Tel:[phone]  Fax:[phone]



Subject: G05: What is the best workstation simulator?

   The answer, of coarse, depends on what you are looking for. However,
   Yatin Trivedi has made available a summary of an evaluation of the
   workstation based verilog simulators currently available:

SEVA Technologies, Inc. co-founders Yatin Trivedi and Larry
Saunders, well-known industry consultants, organized and conducted these
evaluations, third in an ongoing series.  The evaluations are based on the
SEVA Evaluation Index (SEI), which is a comprehensive set of evaluation
criteria developed by SEVA.  The relative importance of the criteria is
derived from inputs of end users/designers, project managers at system
houses, and EDA tool developers.  The SEI is continually refined with
inputs received from previous Verilog and VHDL evaluations. Besides
raw performance, the index is weighted by measures such as language
compliance, debugging capability, integration with the design
environment, programming language interface (PLI), ability to handle a
design's timing data (SDF), product documentation, installation and
licensing, and technical support.

SEVAFs evaluation criteria and results, including the SEI distribution
and ranking based on the SEI, are summarized below.

SEI Criteria            Weight          Vendor          SEI Score
Performance             50              Chronologic     82.14
(Compile+Run+Memory)                    Cadence         69.31
Language Compliance     20              Intergraph      47.24
Debug Commands          10              Simucad         36.86
Design Env Integration   6              CAD Artisans    23.49
PLI Support              6              Wellspring      23.15
SDF and Timing           6              interHDL        22.96
Documentation &          2
Technical Support

An article outlining the evaluation results are published in the March,
1995 issue of "Integrated System Design" magazine.  Complete results
and the details of the evaluation methodology can be obtained by
subscribing to SEVA's Newsletter The Ultimate EDA Tool.



Subject: G06: Is there a vgrind def file?

   Yes. Available in the archives as:

   ftp.cray.com:/pub/comp.lang.verilog/verilog-vgrind-def.Z

Subject: G07: Is there a free verilog parser available?

   Yes. There are two known public domain parsers.

   ftp.cray.com:/pub/comp.lang.verilog/hdl.y.Z
       This one was donated by Frank Bennett ([e-mail]).
       Here's what Frank had to say about it:

     hdl.y below is a verilog parser written using the Unix utility -
     yacc. It by no means is a complete verilog parser. This only
     represents a few nights of effort in front of the ole PC. This is
     donated in the hope that this will enable additional work by
     individuals interested in learning verilog & yacc.


   ftp.cray.com:/pub/comp.lang.verilog/verilog_parser.tar.Z
       The second is from Michael A. Riepe ([e-mail]). Here's
       what he had to say about it:

     I ran across a verilog-HDL parser authored by
     [e-mail]. It is available by anonymous FTP from
     ic.berkeley.edu in directory /pub/stcheng/vl2mv.tar.Z. It is part of
     a verilog->bliff translator. It comes complete with a wrapper for
     the translator, and contains the parser and code to build the parse
     tree. One of the handiest things is a traverse routine which echoes
     the input file back to the output by traversing the data structures,
     thus giving you a template to base your own application on.

     The parser itself seems to contain most of the verilog-HDL grammar,
     though many behavioral constructs are unimplemented in the data
     structure routines. It is still under development, so there are
     bugs. I spent a few days hacking the code and removed a lot of hooks
     to berkeley OCTTOOLS code that wasn't included with the
     distribution. The code as I downloaded it didn't compile. I'll place
     this on the anonymous FTP site here (ftp.eecs.umich.edu in
     people/riepe) - you'll get a version that compiles (at least it does
     on my decstation) and a list of bug fixes that have been sent to me
     other people I've given it to.

     Bug reprts/fixes should be sent both to [e-mail], and
     [e-mail] (the author of the original version)



Subject: G08: Is there a free Verilog simulator?

   There is a free, copylefted Verilog simulator called "vbs", written by
   Jimen Ching and Lay Hoon Tho as a senior design project in the
   electrical engineering curriculum of the University of Hawaii, College
   of Engineering.

   It is available from the archive at:

     * FTP: ftp://ftp.cray.com:/pub/comp.lang.verilog/vbs-1.2.tar.gz

   It appears that Veriwell/386 and Veriwell/Sparc are now shareware. Use
   is free for source files under 1000 lines. For larger files, a
   hardware dongle is required for the MS-DOS version, a license for the
   Sparc version. The simulator is available for downloading from the
   Wellspring Solutions BBS or via ftp:

     * BBS: 1-508-865-1113 (8-N-1)
     * FTP: ftp://iii.net:/pub/pub-site/wellspring/



   InterHDL also has shareware version. Eli Sternheim says "This is a
   full Verilog simulator with the following exceptions: no PLI, specify
   blocks are ignored, no switch level constructs but gates and
   primitives are supported. Also there is a size limitation on the
   design."

     * FTP: ftp://ftp.netcom.com/pub/el/eli

   InterHDL's simulator can also be had through their mailserver. send an
   e-mail to [e-mail] with the word "help" in the body of the
   message.

Subject: G09: Is there a Verilog test suite?

   [contributed by Rich Kolb <[e-mail]>]

   The OVI Test and Compliance Committee has acquired Verilog HDL tests
   and organized them into a test suite. Most of the tests are very small
   "atomic" tests that test one particular portion of the language. Each
   test consists of the Verilog circuit file and the simulation output
   file produced by OVISIM. OVISIM is the Verilog clone produced by
   Cadence and contributed to OVI.

   To induce organizations to contribute additional tests, the entire
   test suite is available to anyone who contributes 25 tests or tests
   with at least 1000 lines of Verilog code. Currently there are more
   than 400 tests in the test suite (9/12/84). Naturally, OVI would
   appreciate it if even more tests were submitted. OVI would like to see
   as many tests shared by the Verilog community as possible.

   The test submission system is set up to automatically function by
   e-mail. Tests can be mailed to the test system and it will run the
   simulations and send back the results.

   OVI welcomes all contributed tests. If a developer is only interested
   in the simulation results from a single circuit, that circuit can be
   sent to the test system and the simulation results will be returned.

   For more information on the test submission format and procedure, send
   mail to [e-mail]

Subject: G10: Where can I find a free Verilog quick reference card?

   In the archive, of coarse! A postscript quick reference card has been
   donated by Rajeev Madhavan. It is available in the archive:

   ftp.cray.com:/pub/comp.lang.verilog/ref.tar.Z

Subject: G11: Are there related Web sites?

   Here are some links to Verilog related sites:

   Cadmazing's DA-Related Information on the Web
          http://www.cadmazing.com/cadmazing/pages/da.html

   EE Times
          http://techweb.cmp.com/eet/

   Electronic Design Automation Companies
          http://www.edac.org

   IVC (International Verilog Conference)
          http://www.e2w3.com/ivcconf.html

   DAC (Design Automation Conference)
          http://www.dac.com/dac.html



Subject: A01: Verilog vendors and products

   Caveat: Many of these product descriptions were written by the vendor.
   They may contain hype.

   Alta Group (formerly Comdisco Systems) of Cadence Design Systems
   Alternative System Concepts, Inc.
   Attest Software Inc.
   Cadence Design Systems, Inc.
   Caesium Inc.
   Chronologic Simulation
   Design Acceleration, Inc.
   DS Diagonal Systems Inc.
   Fintronic USA, Inc.
   FrontLine Design Automation Inc.
   i-Logix Inc.
   Intellitech Corporation
   Intergraph Electronics
   interHDL, Inc.
   Library Technologies, Inc.
   Precedence Incorporated
   Pragmatic C Software Corp.
   Simucad
   SpeedSim, Inc.
   Sunrise Test Systems
   Synopsys Inc
   Systems Science Inc.
   Verilog Consulting Service
   Veritools Inc.
   Vista Technologies, Inc.
   Wellspring Solutions, Inc.


     _________________________________________________________________

   Vendor:
          Alta Group (formerly Comdisco Systems) of Cadence Design
          Systems
          919 E. Hillsdale Blvd. Suite #300
          Foster City, CA 94404
          Phone: [phone]
          FAX: [phone]
          Email: [e-mail]
          URL:

   Product:
          Hardware Design System (HDS)

   Description:
          The Hardware Design System (HDS) is a companion product to
          Alta's Signal Processing Worksystem (SPW). Designers of DSP,
          Communication and Multimedia systems use SPW/HDS to capture and
          analyze algorithms and behavior at the system level. Once the
          behavior/algorithm is verified, designers proceed to define the
          Hardware Architecture of their system using a powerful set of
          parameterized architectural blocks.

          HDS includes a library-based HDL generator which generates
          optimized Verilog (VHDL) code, targetted for specific synthesis
          tools. In addition, HDS includes an HDL-Import capability,
          which allows designers to co-simulate system-level diagrams
          with Verilog (VHDL) code.

   Supports:
          SPARC, HP700, IBM RS600


     _________________________________________________________________

   Vendor:
          Alternative System Concepts, Inc.
          P.O BOX 128
          Windham, NH 03087 USA
          Phone: [phone]
          FAX: [phone]
          Email: [e-mail]
          URL: http://www.ascinc.com

   Product:
          verilog2vhdl

   Description:
          verilog2vhdl translates Verilog HDL to IEEE1076-1987 compliant
          VHDL using the Standard Logic 1164 package. The present form of
          verilog2vhdl can perform a full structural translation and
          partial translation of RTL constructs in Verilog. The tool can
          also provide a software procedural interface to output VHDL.
          Future releases will support full RTL and behavioral
          translation of Verilog. IEEE1076-1993 compliance is also
          expected soon.

          The product will be available in the first quarter of 1995.

   Supports:
          SunOS 4.1.x, MS-DOS


     _________________________________________________________________

   Vendor:
          Attest Software Inc.
          4677 Old Ironsides Drive, Suite 100
          Santa Clara CA 95054
          Phone: [phone]
          FAX: [phone]
          Email: [e-mail]
          URL: ftp://ftp.netcom.com/pub/at/attest

   Product:
          TDX (R)

   Description:
          TDX is a high-performance, interactive fault simulation and
          automatic test generation software system for Verilog.

          The software is built around a high-performance concurrent
          fault simulator that supports all of the unidirectional
          primitives, wire types, and gate/net delays defined in the
          Verilog 2.0 LRM. UDPs are also supported, along with optimized
          built-in models for single and multi-port RAMs.

          It is not necessary to sacrifice accuracy for fast fault
          simulation.

          The software supports the detailed pin timing and strobing
          features found on "tester-per-pin" ATE.

          TDX_FSIM - highly accurate, fast fault simulator with full
          timing and states/strengths.

          TDX_IDDQ - flexible, programmable transistor-short fault
          simulation and vector selection for current measurement
          testing.

          TDX_STEP (TM) - static and dynamic testability analysis, and
          test improvement program that supports both scan and non-scan
          designs.

          TDX_ATG - sequential test generation for scan and non-scan
          designs. Tightly integrated with tdx_fsim, tdx_step, and
          tdx_iddq.

          Free demo executables are available by anonymous ftp from
          ftp://ftp.netcom.com/pub/at/attest. The demo software runs on
          any small circuit, and also on an 8085 microprocessor clone
          model that is available at the ftp site.

   Supports:
          Sun Sparc, HP PA-RISC, and Windows NT.


     _________________________________________________________________

   Vendor:
          Cadence Design Systems, Inc.
          555 River Oaks Parkway
          San Jose, CA 95134
          Phone: [phone]
          Fax: [phone]
          email: ?
          URL:

   Product(s):
          Verilog-XL

   Description:
          The industry standard Verilog simulator.

   Supports:
          most workstations


     _________________________________________________________________

   Vendor:
          CAESIUM, Inc.
          3542 Earl Drive
          Santa Clara, CA 95051
          Phone: [phone]
          [phone]
          Fax: [phone]
          email: [e-mail]
          URL:

   Product(s):
          Verilog HDL Model Libraries (Custom VLSI & ASIC model
          development)

   Description:
          CAESIUM, Inc. provides Verilog HDL Model Libraries.
          CAESIUM works with the customer to provide all the 'Missing
          Models' (sm) for the customer's current and next projects.

          Features Include:

         1. Full Function.
         2. Accurate Timing.
         3. Synthesizable.
         4. Intelligent X-handling.
         5. Verilog HDL Source Code models.
         6. Fast Execution.
         7. Low Cost.



          ABT, ACT, ALS, AS, BCTTTL, HCT, F, S, LS Series Glue logic
          parts.

          FIFOs, MEMORIES and PAL models are available for some families,
          others can readily be developed on needed basis.

          Partial Function or Bus Function Models can be developed at a
          nominal cost.

   Supports:
          Models will work under LRM compatible Verilog simulators.
          Verilog-XL, VCS, SILOS III, Viper, etc.


     _________________________________________________________________

   Vendor:
          Chronologic Simulation
          5150 El Camino Real
          Los Altos, CA 94022
          Phone: (800) VERILOG or [phone]
          FAX: [phone]
          email: [e-mail]
          URL: http://www.chronologic.com/

   Product(s):
          VCS, Verilog Compiled Simulator

   Description:
          Product is a Verilog Compiler offering 10x speed improvement on
          behavioural code, and 1/10 memory usage; all as compared to
          Verilog-XL 1.6. Supports the complete language, as well as
          interactive debugging. Also supports SDF and the full PLI, and
          offers incremental compilation. Compiles to machine code on
          Sparc and HP machines, compiles to C on others.

   Supports:
          Sparc SunOS, Sparc Solaris, HP PA-RISC, SGI, IBM RS6000, Sony
          NeWS, DEC Alpha

   Product(s):
          VMC, Verilog Model Compiler

   Description:
          Product takes Verilog HDL source models and compiles them to C
          object modules for use with VCS, Verilog-XL and other Verilog &
          VHDL simulators. Allows component builders to release high
          performance, low memory, proprietary models to their customers
          - as object form - ie providing a very attractive alternative
          to source protection/encryption.

   Supports:
          Sparc SunOS, Sparc Solaris, HP PA-RISC


     _________________________________________________________________

   Vendor:
          Design Acceleration, Inc.
          2105 Hamilton Ave., Suite 370
          San Jose, CA 95125
          Phone: [phone]
          Fax: [phone]
          email: [e-mail]
          URL: http://www.designacc.com

   Product(s):
          Signalscan 4.0 & Pro

   Description:
          Signalscan is a complete waveform viewing, simulation analysis
          and tightly coupled source code debugging environment for
          Verilog and mixed Verilog/analog simulation. Signals may be
          backtraced from the waveform or source code views without need
          to refer to a schematic. Signals load from the SST simulation
          database in a fraction of the time it takes for conventional
          solutions. Signalscan includes Sequence Time (patent pending):
          a new time domain that gives graphical visibility into a
          Verilog-specific problem of sequence order dependent results.

          Signalscan supports simultaneously viewing signals from mixed
          simulation environments, including Cadence's Verilog,
          Chronologic's VCS, Fintronic's FinSim, Frontline's BaseLine and
          SimLine, Ikos' Gemini, SIMUCAD's SILOS, EPIC's TimeMill and
          PowerMill and Meta Software's HSPICE.

   Supports:
          SPARC, HP, SGI, RS/6000, Windows


     _________________________________________________________________

   Vendor:
          DS Diagonal Systems Inc.
          800 El Camino Real, Suite 180
          Mountain View, CA 94040
          Phone: [phone]
          Fax: [phone]
          email: [e-mail]
          Phone (Europe): [phone]
          Fax: (Europe): [phone]
          email (Europe): [e-mail]
          URL: http://www.diagonal.com/

   Product(s):
          WAVE-Link, CHECK-Link, CAT-Link

   Description:

        WAVE-Link
                WAVE-Link is a highly interactive, graphical toolset for
                generating digital stimulus waveforms and defining
                expected responses that are simulator and ATE system
                independent. Stimulus creation is fast and and visual -
                free from the specific syntax of any simulator or ATE
                system. WAVE-Link is your common front-end tool for VHDL,
                Verilog and gate level simulators.

        CHECK-Link
                Design verification according to company's guidelines;
                testability verified during design.

        CAT-Link
                Design and layout consistency verification; design and
                layout data transfer to manufacturing (ATE & Pick/Place)



   Supports:
          SUN, HP, SCO UNIX, RS/6000, Windows (soon)


     _________________________________________________________________

   Vendor:
          Fintronic USA, Inc.
          1360 Willow Road, Suite 205
          Menlo Park, CA 94025
          Phone: [phone]
          FAX: [phone]
          Email: [e-mail]
          URL:

   Product(s):
          FinSim Verilog Simulation Environment

   Description:
          FinSim is a high performance Verilog simulation environment. It
          features full language implementation including support for PLI
          1.0, VCD, PLA, and SDF. FinSim has a very fast Verilog analyzer
          with extensive error checking and recovery mechanism. FinSim
          simulator can run in both compiled or interpreted mode as well
          as mixed mode. Compatibility with Verilog-XL is excellent.

          FinSim 2.0 was rated the fastest PC-based Verilog simulator in
          the published benchmark comparison from Integrated Design
          System (formerly ASIC & EDA). With FinSim 4.0, simulator run up
          to 40x faster while utilizing less memory. PLI and SDF access
          is greatly optimized. In addition, FinSim 4.0 has several new
          features including incremental compilation and full support for
          source level debugger from Design Acceleration Signalscan and
          Veritools Undertow.

          FinSim supports VCD waveform display tools from Design
          Acceleration, Veritools, and Systems Science. Schematic capture
          system is supported from Data I/O. FinSim is also the core
          simulation engine in the Intergraph Veribest Design System.

          FinSim has a list price from $995 to $10,000 for all platforms.
          Prices reflect single license per machine. Multiple and
          educational discounts are available. Evaluation version of
          FinSim is available upon request.

   Supports:
          Solaris 1.1, Solaris 2.4 (Sun, Intel x86), Dec Unix, HP-UX, SGI
          Irix, Sony NEWS, Windows NT (Intel x86, Alpha, MIPS, PowerPC),
          OS/2, Window 95, Windows 3.1/DOS, Unixware, and Linux.


     _________________________________________________________________

   Vendor:
          FrontLine Design Automation Inc.
          2860 Zanker Road, Suite 203
          San Jose CA 95134
          Phone: [phone]
          FAX: [phone]
          Email: [e-mail]
          URL:

   Product(s):
          SimLine (Compiled Verilog Simulator)

   Description:
          In one powerful simulation environment, SimLine provides the
          benefits of a very fast RTL level simulation with a compiled
          engine, fast turn around with aninterpreted engine and fast
          gate level simulation with a XL engine. In addtiotion SimLine
          has enhanced timing accuracy over current Verilog
          implementations to handle deep submicron ASIC technologies.
          SimLine's debug and analysis environment makes HDL based design
          easier with tools like a Source Level Debugger, Design
          Analyzer, Hierarchy Manager and Waveform and Register displays.
          In addition, SimLine is the highest compatibility Verilog
          simulation solution on the market today.

   Supports:
          Sun, HP

   Product(s):
          BaseLine (Interpretive Verilog Simulator)

   Description:
          BaseLine provides a full featured, highest com[patibility,
          Verilog simulation environment for both PCs and Workstattions.
          BaseLine has a powerful design and debug environment featuring
          a Source level debugger, Hierarchy Management and both Waveform
          and register display tools. BaseLine offers very competitive
          performance and capacity making it ideal for the FPGA designer
          or thise looking to extend their Verilog environments.

   Supports:
          PC (Windows 3.1, NT), Sun, HP


     _________________________________________________________________

   Vendor:
          i-Logix Inc.
          22 Third Avenue
          Burlington, MA 01803
          Phone: [phone]
          FAX: ?
          Email: ?
          URL:

   Product(s):
          ExpressV-HDL

   Description:
          Provides a graphical environment to develope Statecharts.
          Equivalent Verilog or VHDL is automagically generated.

   Supports:
          ?


     _________________________________________________________________

   Vendor:
          Intellitech Corporation
          66 Route 25
          Meredith, NH 03253
          Phone: [phone]
          FAX: [phone]
          Email: [e-mail]
          URL:

   Product(s):
          BSDLMaker

   Description:
          BSDLMakerTM is a design-for-test tool for creating BSDL
          (Boundary Scan Description Language) files from Verilog
          netlists. BSDLMakerTM will compile your structural Verilog
          netlist (including flattening of hierarchical designs) and
          silicon package pin file, perform a number of 1149.1 design
          compliance checks, generate a BSDL file and produce a design
          warning/error message file. It supports libraries from multiple
          silicon vendors, multiple synthesis vendors and user defined
          1149.1 designs.

   Supports:
          PC, SUN


     _________________________________________________________________

   Vendor:
          Intergraph Electronics
          Huntsville, Al 35894-0001
          Phone: 1-800-VERIBEST
          FAX : [phone]
          email: [e-mail]
          URL: http://www.ingr.com

   Product(s):
          VeriBest Design System

   Description:
          The VeriBest suite of products provides an easy to use
          ASIC/FPGA design environment. The environment will be sold in a
          software only form as the VeriBest Designer and will be bundled
          with Intergraph's TD1 hardware platform as the VeriBest Design
          System. VeriBest Designer has the following software
          components:

          Electronics Desktop Manager - Our electronics specific
          graphical desktop which organizes design data and launches
          applications. The Electronics Desktop manager includes the
          Design Methodology Manager, a tool that allows software
          products to be organized into an enforced process oriented flow
          (e.g., the steps required to build an ASIC or FPGA as specified
          by a silicon vendor).

          ACEPlus Design Entry System - Our front-end design entry editor
          that utilizes hierarchical design to organize the use of
          primitive symbols and representative blocks for Verilog source
          files or State diagrams.

          ACEPlus Designer - Our automatic HDL generator that takes
          schematics and state diagrams created with ACEPlus Design Entry
          System and automatically generates simulatable VHDL, Verilog
          HDL, or ABEL HDL.

          VeriBest Simulator - Our high performance, high capacity
          Verilog-XL compatible simulator which includes VeriScope, our
          graphical waveform viewer and simulation controller.

   Supports:
          Sun Sparc, Intel 486 & Pentium


     _________________________________________________________________

   Vendor:
          interHDL, Inc.
          4984 El Camino Real, Suite 210
          Los Altos, CA 94022-1433
          Phone: [phone]
          Fax: [phone]
          email: [e-mail]
          URL:

   Product(s):
          Veribase, Verinet, Verilint, Viper, interFlat, interVHDL

   Description:

        Veribase
                Reads a Verilog HDL design, builds an internal database
                and provides a set of database access functions for
                developing in-house EDA tools. This tool supports full
                set of the Verilog language.

        Verinet
                A subset of Veribase which handles only the gate level
                Verilog. It also has a flattener which can flatten the
                design hierarchy and/or busses in an orhtogonal way,
                i.e., the two expansions are two separate functions.

                Both Veribase and Verinet are toolkits which have a
                library of API/PLI functions for accessing the design
                database.

        Verilint
                A semantic, synthesis, and design rules checker for
                Verilog designs. It has its own graphical user interface
                and a text editor. The tool allows designers to
                interactively find and fix design errors prior to
                simulation and synthesis.

        Viper
                A full Verilog HDL simulator that supports behavioral,
                RTL, logic gates, and UDPs. It is fully compatible with
                OVI's LRM 1.0 specs and Verilog-XL in terms of results
                and usage. Uses existing scripts and makefiles for
                verilog-XL simualtion. Interfaced to popular waveform
                displays: SignalScan, UnderTow and Megallan. Available in
                three versions: Viper/DOS (Personal), Viper/Windows
                (FPGA/PLD), and Viper/UNIX (ASIC/FPGA).

        interFlat
                Reads hierarchical Verilog netlists, flattens the
                hierarchy and writes a flat Verilog, VHDL, EDIF, or
                FutureNet file. The operation of flattening is extremely
                fast. This is also available in the form of a toolkit,
                Verinet, to build in-house tools.

        interVHDL
                Converts Verilog HDL designs into functionally equivalent
                VHDL designs. If a Verilog design is synthesizable then
                the translated VHDL design will also synthesize and the
                simulation results will be the same except for the
                simulator dependencies. Does not support fork-join and
                disable statements.

   Supports:
          Sun, HP, IBM/RS6000, DEC/Alpha, SGI.


     _________________________________________________________________

   Vendor:
          Library Technologies, Inc.
          18837 Casa Blanca Lane
          Saratoga, CA 95070
          Phone: [phone]
          Fax: [phone]
          email: [e-mail]
          URL:

   Product(s):
          Libchar, Stimgen, Verigen, Veritest, Syntest

   Description:
          ASIC library generation tools, based on synthesizing ACDL
          description of the cells into target simulation and synthesis
          libraries. ACDL is ASIC Cell Description Language, proprietary
          to Library Technologies.

          Stimgen automatically synthesizes the timing behavior of the
          ASIC cell and generates stimuli for characterizing each of the
          timing and electrical parameters of the cell.

          Libchar is the automatic characterizer, which measures each of
          the electrical parameters and fits them into one of several
          delay models. Verigen converts ACDL descriptions into
          structural verilog complete with specparams and pin-to-pin
          paths using the parameters calculated by libchar.

          Syntest converts ACDL descriptions into RTL verilog, to be used
          for verifying synthesis libraries and technology mapping.

          Veritest generates a testbench to verify the functionality of
          the verilog representations of the cell.

   Supports:
          Sparc


     _________________________________________________________________

   Vendor:
          Precedence Incorporated
          4675 Stevens Creek Blvd., Suite 250
          Santa Clara, CA 95051
          Tel: [phone]
          Fax: [phone]
          email: [e-mail]
          URL:

   Product(s):
          SimMatrix co-simulation products:

        Cadence Verilog / Vantage Spreadsheet Co-simulation
        Cadence Verilog / QuickVHDL hardware emulator Co-simulation
        Cadence Verilog / EPIC Design TimeMill and PowerMill Co-sim
        Cadence Verilog / Mentor Lsim Co-simulation
        Cadence Verilog / Silvaco SmartSpice Co-simulation
        Mentor Graphics Quicksim II / Cadence Verilog-XL
        Viewlogic Viewsim - VHDL / Cadence Verilog-XL



   Description:
          Precedence co-simulation products allow designers to
          concurrently simulate using both Verilog-XL and the specialized
          design verification tools as shown above, simultaneously and
          transparently. This is useful for IC, ASIC and PCB simulation
          which includes blocks or models in a variety of simulators
          and/or languages. At the heart of this integrated simulation
          environment is Precedence's extensible SimMatrix simulation
          backplane.

   Supports:
          Sun, HP, other workstations


     _________________________________________________________________

   Vendor:
          Pragmatic C Software Corp.
          220 Montgomery Street, Suite 925
          San Francisco, CA 94104
          Tel: [phone]
          Fax: [phone]
          email: [e-mail]
          URL: under construction

   Product(s):
          Pver (Interpretive Verilog Simulator)

   Description:
          Complete Verilog simulator now OVI LRM compliant will be IEEE
          1364 compliant. Pver offers a Verilog simulator for large ASIC
          design at 1.5 to 2 times the cost of commercial programming
          language compilers to allow every designer to have unlimited
          access to a Verilog simulator. Price performance is at least 3
          times any other full featured Verilog simulator. Pver is
          intended to include provisional features that may later be
          added to the standard. Some features are:

         1. Fast one pass source translation.
         2. Efficient memory use - packing to the bit and only one
            instance of each module stored unless copies are required
            because of defparams.
         3. Programming language style debugger: GDB syntax modified for
            instance trees in addition to statement debugger.
         4. Alternative debugging features: enhanced parallel activity
            tracing and control thread and post-mortem dumping.
         5. Spike analysis with unknown injection.
         6. Added mechanism for per instance distributed primitive
            delays.
         7. Includes PLI tf_ routines but also contains features to allow
            implementation in Verilog instead of requiring PLI.
         8. Most features from Vcmp: gate eater, circuit content tables,
            lint style checking during translation and simulation, and
            warning/inform suppression by number.
         9. Good simulator for beginners because error messages explain
            what is expected and because edge processing is regular and
            complete.
        10. Good simulator for experts because Pver contains features for
            command and script based debugging.
        11. Full featured PC (Linux/OS2/DOS) and Macintosh personal
            licenses that may only be used by one designer in any 30 day
            period but do not require dongles.
        12. Geographically unlimited CPU architecture fungible floating
            workstation licenses.

   Thirty day free trial. Detailed release notes emailed upon request.

   Supports:
          PC (OS2, Linux Unix, VCPI compliant DOS), Macintosh (Machten
          BSD Unix), Sparc (SunOS 4.1x), others upon request.


     _________________________________________________________________

   Vendor:
          Simucad
          32970 Alvarado-Niles Road
          Union City, CA 94587
          Phone: [phone]
          Fax: [phone]
          email: [e-mail]
          URL:

   Product(s):
          Silos III

   Description:
          Silos III is the next generation of Simucad's Silos simulator
          which was first introduced in 1983. It is an integrated logic
          and fault simulation environment. Silos III used Verilog to
          support top-down methodology.

   Supports:
          Sun, VAX, HP, RS6000, MIPS, PC


     _________________________________________________________________

   Vendor:
          SpeedSim, Inc.
          234 Littleton Road, Suite 2E, PO Box 4035
          Westford, MA 01886
          Phone: [phone]
          FAX: [phone]
          Email: [e-mail]
          URL: http://www.speedsim.com/speedsim/

   Product:
          SpeedSim/3 Cycle-based Simulator; Simultaneous Test Option; &
          SMP Option

   Description:
          SpeedSim/3 is a Cycle-based simulator. It accepts Verilog
          gate-level, & synthesizeable subset of Verilog & VHDL RTL (Rel.
          2.0). Compliant with OVI PLI. Performance is 10 to 100 times
          faster than Chronologic (RTL level), using 1/5th the memory.
          Produces up to 2,000 cycles per second throughput on simulation
          of large designs. Compiles 1M gate design in 10 minutes into 16
          MB runtime image; SAVE/RESTORE in 4 seconds.. Detects
          Asynchronous logic & tri-state bus contentions.

          Simultaneous Test (TM) Option, a unique SpeedSim/3 option,
          allows up to 32 different tests, such as diagnostics or
          application program streams, to run simultaneously on the same
          image of a design model. Simultaneous Test boosts performance 5
          to 32 times over the base SpeedSim/3 product.

          Symmetric Multi-Processing (SMP) option was built from the
          start to get the most out of SMP technology. It's unique
          Multithread management techniques can deliver near linear
          performance gains on up to eight processors implemented in a
          single system. These processors work in tandem simulating a
          single model that yields great efficiency on a shared memory
          system. Users can economically increase performance simply by
          plugging in additional processors. This is particularly
          attractive for designs over 500,000 logic gates where engineers
          can get much faster turnaround on a long test using the
          SpeedSim/3 SMP option. With large designs, SpeedSim/3 users
          will realize near linear performance increases with minimal
          memory impact when they add additional processors.

   Supports:
          UNIX workstations from Sun Microsystems (SunOS, & Solaris),
          IBM, & Hewlett Packard.


     _________________________________________________________________

   Vendor:
          Sunrise Test Systems
          2730 SanTomas Expressway #200
          Santa Clara, CA 95051
          Phone: [phone]
          Fax: [phone]
          email: [e-mail]
          URL:

   Product(s):
          TestGen (TM), FaultSim, START, IddQTest, PathTest (TM),
          ParallelTestgen

   Description:
          Sunrise Test Systems offers Test Synthesis, Design for test
          tools and Testability analysis tools based on Verilog. Its
          products include Automatic Test Pattern Generation tools for
          stuck-at, IddQ and path delay faults. Verilog drivers are
          created for the vectors generated by the tool for verification
          using verilog simulator. Test vector interfaces are provided to
          support most of the ASIC vendor simulators (LSI, Toshiba,
          Motorola, VLSI, Fujitsu, Mitsubishi, NEC etc.) and commercial
          simulators such as verilog XL, Zycad, Ikos. TSSI WGL format is
          also supported.

        TestGen
                Automatic Test Pattern Generator which generates high
                coverage tests for stuck-at-fault models. Testgen is
                complemented by a high performance test vector compactor
                that leads to lowered test application times. Testgen is
                an industry standard test generation tool that
                incorporates patented test generation algorithms. It has
                been successfully used on a wide variety of
                design-for-test methodologies such as full scan, almost
                full scan and partial scan circuits.

        FaultSim
                High performance fault simulation tool that uses the
                least amount of memory and run time. Can be used
                stand-alone or with the Testgen tool.

        START
                Sunrise Testability Analysis and Rule checking tool is a
                collection of programs used for testability analysis and
                test logic synthesis. START includes LITE program that
                can stitch scan chains, insert structured non-scan test
                logic such as control and observe logic with the least
                impact on area and performance. Any netlist modifications
                are done preserving the design hierarchy. START can be
                used to identify flops to be scanned for partial scan
                design-for-test methodology. START includes a design rule
                check program that can verify scan chains, check for
                various design-for-test rules. IEE1149.1 (JTAG) standard
                compliance checking software is a part of START. START
                also contains an interactive logic simulator and a
                circuit browser.

        IddQtest
                An automatic test pattern generator for IddQ faults. It
                generates a compact setof test vectors yet achieving high
                IddQ fault coverage. It can also be used to identify IddQ
                strobe points in a user supplied vector set such as
                fucntional vectors.

        PathTest
                An automatic test pattern generator for path delay (slow
                to rise/fall) faults. This is very useful for part
                binning and design debugging.

        Parallel Testgen
                Automatic test pattern generator that exploits a network
                of heterogeneous UNIX work stations. Test generation time
                on sequential circuits can be significantly reduced by
                using this product.



   Supports:
          Sun Sparc, HP PA-RISC, IBM RS6000, SGI


     _________________________________________________________________

   Vendor:
          Synopsys Inc
          700 East Middlefield Road
          Mountain View, CA 94043
          Phone: [phone]
          Fax: [phone]
          email: ?
          URL:

   Product(s):
          HDL Compiler(tm) for Verilog

   Description:
          The HDL Compiler family provides translation and architectural
          optimization of Verilog design descriptions prior to logic
          synthesis. It's architectural optimization is based on resource
          selection and implementation of DesignWare(tm) Synthetic
          Designs. The HDL Compiler family works with the
          industry-leading logic synthesis and test synthesis product
          lines, Design Compiler(tm) and Test Compiler(tm), to quickly
          produce designs that are often smaller and faster than is
          possible using schematic capture techniques.

   Supports:
          Most workstation platforms


     _________________________________________________________________

   Vendor:
          Systems Science Inc.
          1860 Embarcadero Rd., Suite 260
          Palo Alto, CA 94303
          Phone: [phone]
          Fax: [phone]
          email: [e-mail]
          URL:

   Product(s):
          MAGELLAN, POWERFAULT, POWERSIM, VERA, VERITY

   Description:
          MAGELLAN - Graphic source-level debugger and waveform display.
          Runs with interactive Verilog, from VCD dumps, or from SSI's
          VCD++ binary, indexed files. Can load and display files of over
          200Mb almost instantaneously. Loaded with powerful features.

          POWERFAULT - A push-button IDDQ solution for Verilog designs.
          It finds near-optimal IDDQ vectors, and generates detailed
          fault coverage reports. It can be used in conjunction with
          conventional fault simulators to increase the coverage, or
          independently, by itself. Handles both "stuck-at" and "short"
          faults.

          POWERSIM - Get accurate power information, at an early stage in
          the design. Use your unmodified Verilog-HDL sources, plus
          backannotated capacitance and voltage information. Compute the
          dynamic power usage for the whole circuit, or for portions of
          the hierarchy. Avoid heat, power, and metal migration problems.


          VERA - A design verification system, which allows design and
          verification engineers to thoroughly exercise complex Verilog
          circuits. Users create compact and powerful test benches in the
          high level Vera language. Vera verifies the design by
          simulating the test bench, while it talks via PLI with a
          Verilog simulator that simulates the design.

          VERITY - A kit for tool developers that handles the full
          Verilog-HDL language, and provides the following self-contained
          modules with their corresponding APIs: (a) parser, (b)
          hierarchical database builder and navigator, (c) elaborator and
          flattener, (d) behavioral to compiled code (machine code for
          SPARC, C for other architectures), and (e) fault divergence and
          convergence.

   Supports:
          SPARC, HP700


     _________________________________________________________________

   Vendor:
          Verilog Consulting Service
          885 N. San Antonio, Suite S
          Los Altos, CA 94022
          Phone: [phone]
          FAX:
          Email: [e-mail]
          URL: http://www.vcs.webnexus.com

   Product:
          Consulting Services

   Description:
          Verilog Consulting Service was created by more than a dozen
          members of Chronologic Simulation, who left that company, which
          was then a subsidary of Viewlogic Systems, in a sercurities
          fraud allegation against Viewlogic Systems, relating to the
          merger of Chronologic Simulation and Viewlogic.

          First and foremost, V.C.S. apologizes deeply for the
          inconvenience and concern that this action may have caused you,
          the VCS user community. We feel a strong loyalty to you and
          know that our leaving does not make your job easier.

          We are available to help you with any questions you may have
          about VCS. We cannot make enhancements or changes to the
          product -- we don't have the source code. However, we are
          available to answer questions on general usage, ways to use VCS
          more efficiently or suggestions on how to work around the
          occasional bug. We don't want you to be dead in the water.

          We are also available for general Verilog HDL consulting and
          training. We represent experts in Verilog HDL, auxiliary
          programs using PLI and of course, a lot of knowledge about how
          to best use VCS. While we are working on an agreement with
          Viewlogic, we are available to help on your projects. We have a
          lot of energy and want to devote it to solving problems
          important to our customers. We look forward to hearing from
          you.

          This offer of help should in no way be construed as competitive
          to VCS or Viewlogic. We are not currently available to write a
          new simulator or consult on how to make a competing simulator
          faster. We hope to apply that knowledge to VCS again one day
          soon.

          Please feel free to contact any of us with questions.


     _________________________________________________________________

   Vendor:
          Veritools Inc.
          161 S. San Antonio Road, Suite 6A
          Los Altos, CA 94022
          Phone: [phone]
          Fax: [phone]
          email: [e-mail]
          URL:

   Product(s):
          Undertow, veriLINT, Snapsim, VLTool, Nettool, interVHDL, Vflat,
          openHDL Toolkit, Typetool, Metatools, VerilogSIMULATOR, flowHDL


   Description:
          Veritools software products are software tools specifically
          designed for verilog users or CAD groups using Verilog.

          Veritools software is available via anonymous ftp at
          netcom.netcom.com (192.100.81.100) in the directory
          pub/veritools.

   Supports:
          Sun, HP, PC?


     _________________________________________________________________

   Vendor:
          Vista Technologies, Inc.
          1100 Woodfield Road
          Schaumburg, IL 60173-5121 USA
          Phone: [phone]
          FAX: [phone]
          email: [e-mail]
          URL:

   Product(s):
          StateVision, DesignVision, Vista Model Creator

   Description:
          All of Vista's tools generate Verilog suitable for simulation,
          with optional generation specifically for synthesis. All of
          Vista's tools allow users to import Verilog include files so
          that custom parameters, functions and tasks can be utilized.
          DesignVision and StateVision can be integrated with
          off-the-shelf Verilog simulators for a complete design and
          debug environment (set breakpoints in the diagram, step with
          animation, etc.)

        StateVision (tm) for Verilog(r)
                Graphical state machine editor. Generates Verilog from
                bubble diagrams of concurrent state-machines. Open and
                customizable system. Shipping 4Q94.

        DesignVision (tm) for Verilog(r)
                Graphical behavior modeling editor. Uses the DesignVision
                methodology ("threads") for specifying behavior
                graphically. Open and customizable system. Users can
                customize the generated Verilog to their own style and
                build their own graphical primitives (including how the
                primitives generate Verilog). Shipping now.

        Vista Model Creator (tm) for Verilog(r)
                Spreadsheet-like interface that generates Verilog for
                simulation or synthesis. Compact representation ideal for
                ALUs, instruction decoders, etc. Designers have control
                over the Verilog datatypes used. Files developed with the
                Verilog Model Creator can be read into the Vista Model
                Creator for VHDL. Shipping now.



   Supports:
          Sparc, DECstation (Ultrix), IBM RS/6000, HP 9000/7xx


     _________________________________________________________________

   Vendor:
          Wellspring Solutions, Inc.
          P.O. Box 150
          Sutton, MA 01590
          Phone: [phone]
          Fax: [phone]
          email: [e-mail]
          URL:

   Product(s):
          VeriWell, Gates & Timing Preference Module, Standard Delay
          Format (SDF) Preference Module, VeriWaves Preference Module

   Description:

        VeriWell
                The EDA industry's lowest cost Verilog simulator,
                VeriWell is an interactive Verilog HDL Simulator for
                multiplatforms that provides full implementation of
                behavioral- and RTL-level simulation, OVI LRM 1.0
                compliance, and XL compatibility and performance.
                Wellspring's Modular Architecture unbundles major aspects
                of the core simulator that allows user to add Preference
                functionality as design process changes, saving tool and
                development costs. VeriWell also features timescales,
                VCDs, synthesis syntax checking, 1st-pass semantic
                checking, and debugging features.

                VeriWell/Free for MS-DOS, Windows, Macintosh, Sparc, and
                Linux is a full-featured free version of the VeriWell
                simulator available via BBS at 1-508-865-1113 and via
                anonymous ftp at
                ftp://iii.net/pub/pub-site/wellspring/...

        Gates & Timing Preference
                This option adds User-Defined Primitives (UDPs) and
                Specify Blocks. The implementation of UDPs is optimized
                for performance, utilizing state-of-the-art scheduling
                and table-lookup techniques. The Gates & Timing
                Preference is available for all supported environments.

        Standard Delay Format (SDF) Preference
                The SDF optional module will be available soon for all
                supported platforms and environments.

        VeriWaves Preference
                Wellspring's enhanced, full-featured waveform viewer will
                be available soon as an optional module for MS-DOS,
                Windows, Macintosh, and OS/2 (as a seamless Windows
                application).



   Supports:
          386-, 486-, Pentium-based PCs running MS-DOS 5
          Macintosh running System 7
          Sparc and Sparc-compatible stations running SunOS and Solaris
          Windows 3.1, Windows NT, Windows '95
          OS/2 Warp 3.0
          Linux


     _________________________________________________________________

Subject: A02: Books and Reference material on Verilog - REF_FAQ v1b0



        [provided by Cliff Cummings - [e-mail]]

        Alphabetical listing of materials by category:
        * New or revised since REF_FAQ v1b0
          (acknowledgement to [e-mail] for corrections)

        VERILOG REFERENCE MATERIALS
        ===========================
        *(R3) "DIGITAL DESIGN AND SYNTHESIS WITH VERILOG HDL", by
                E. Sternheim, R. Singh, Y. Trivedi, R. Madhavan and
                W. Stapleton
        *(R2) "DIGITAL DESIGN WITH VERILOG HDL", by
                E. Sternheim, R.  Singh and Y. Trivedi
        *(R7) Feature Columns by L. Saunders and Y. Trivedi, regular
                columns in Integrated System Design Magazine
                (formerly ASIC & EDA Magazine)
         (R4) "QUICK REFERENCE FOR VERILOG HDL", by
                R. Madhavan
        *(R6) "SUCCESSFUL ASIC DESIGN THE FIRST TIME THROUGH", by
                J. Huber and M. Rosneck
         (R1) "THE VERILOG HARDWARE DESCRIPTION LANGUAGE", by
                D. Thomas and P. Moorby
     NEW*(R8) "THE VERILOG HARDWARE DESCRIPTION LANGUAGE, Second
                Edition", by D. Thomas and P. Moorby
        *(R5) "VERILOG HDL 2.0 LANGUAGE REFERENCE GUIDE", by
                Sutherland HDL Consulting

        OPEN VERILOG INTERNATIONAL (OVI) REFERENCE MATERIALS
        ====================================================
         (O6) "1993 OVI DIRECTORY OF SUPPORT FOR VERILOG HDL"
        *(O1) "LANGUAGE REFERENCE MANUAL" (LRM), Version 2.0
         (O7) "OPENEXCHANGE"
         (O8) "OPENEXCHANGE" (Back Issues)
        *(O4) "PROCEEDINGS FROM '92 OVI USER GROUP MEETING"
        *(O5) "PROCEEDINGS FROM '93 INT'L VERILOG HDL CONF."
     NEW*(O9) "PROCEEDINGS FROM '94 INT'L VERILOG HDL CONF."
        *(O2) "PROGRAMMING LANGUAGE INTERFACE" (PLI), Version 2.0
        *(O3) "STANDARD DELAY FILE FORMAT MANUAL" (SDF), Version 2.0

        VENDOR REFERENCE MATERIALS
        ==========================
         (V4) "CADENCE VERILOG TRAINING COURSE LABS & SOLUTIONS"
         (V3) "CADENCE VERILOG-XL TRAINING COURSE"
         (V2) "GRAPHICAL OUTPUT FOR THE VERILOG PRODUCT FAMILY REFERENCE"
         (V5) "VERILOG HDL TRAINING COURSE", by Sutherland HDL Consulting
         (V1) "VERILOG-XL REFERENCE MANUAL"

        REF_FAQ REFERENCE-INCLUSION POLICY
        ==================================

VERILOG REFERENCE MATERIALS
===========================

(R1)  "THE VERILOG HARDWARE DESCRIPTION LANGUAGE", by D. Thomas
       and P. Moorby.
       ISBN 0-7923-9126-8

       :        |  :
       Kluwer Academic Publishing Co.   |  Kluwer Academic Publishers Group
       Order Department                 |  Order Department
       P.O. Box 358                     |  P.O. Box 322
       Hingham, MA 02018                |  3300 AH Dordrecht
                                        |  The Netherlands
       Phone: [phone]              |  Phone: [phone]
       FAX:   [phone]              |  FAX:   [phone]
       e-mail: [e-mail]     |  e-mail: [e-mail]

       - Text examples are available upon e-mail request to
         [e-mail]
       - A personal favorite. Good insights into the Verilog
         language by P. Moorby, one of the original authors of
         Verilog. (Submitted by Cliff Cummings)

(R2)  "DIGITAL DESIGN WITH VERILOG HDL", by E. Sternheim, R. Singh
       and Y. Trivedi.
       ISBN 0-9627488-0-3

       Automata Publishing Company,
       1072 S. Saratoga-Sunnyvale Rd., Bldg. A107, San Jose, CA 95129
       Phone: [phone]
       FAX: [phone]
       E-mail: >

       Or Contact Raj Singh, Phone: [phone]
                             E-mail: [e-mail]

       - Comes with a DOS-format floppy disk which includes all text
         examples.
       - Only complaint is that the book has no index.
       - Y. Trivedi has a regular column in Integrated System Design
         magazine.
       (Submitted by Cliff Cummings)

(R3)  "DIGITAL DESIGN AND SYNTHESIS WITH VERILOG HDL", by E. Sternheim,
       R. Singh, Y. Trivedi, R. Madhavan and W. Stapleton.
       ISBN 0-9627488-2-X

       Automata Publishing Company,
       1072 S. Saratoga-Sunnyvale Rd., San Jose, CA 95129
       Phone: [phone]
       FAX: [phone]
       E-mail: >

       Or Contact Raj Singh, Phone: [phone]
                             E-mail: [e-mail]

       - Revised edition of (R2) with added 75 page Synthesis
         chapter, 60-page Verilog HDL semantics chapter, and can
         be purchased with a PC Verilog Simulator.
       - This book DOES have an index.
       - PC Simulator: "This is a full Verilog simulator with the
         following exceptions: no PLI, specify blocks are ignored,
         no switch level constructs but gates and primitives are
         supported. Also there is a size limitation on the design."
         (from Eli Sternheim).

(R4)  "QUICK REFERENCE FOR VERILOG HDL", by R. Madhavan
       ISBN 0-9627488-4-6 - 1993

       Automata Publishing Company,
       1072 S. Saratoga-Sunnyvale Rd., #A107,  San Jose, CA 95129
       Phone: [phone]
       FAX:   [phone]
       E-mail: [e-mail]

       Or Contact Raj Singh, Phone: [phone], FAX: [phone]
                             E-mail: [e-mail]

       Automata Verilog Quick Reference
       ================================
       Advantages:    - 24 pages - Spiral Bound.
                      - Intended to provide a quick reference for
                        semantics and examples.
                      - 3-page section on Synthesis supported/unsupported
                        constructs.
       Disadvantages: - 24 Table of Content entries. No index.
                      - Synthesis section reportedly differs from the OVI
                        synthesis guidelines.
                      - Lists Net data types but not all of the Reg data
                        types, pp 2-3.
                      - Missing keywords: casex, casez, edge, endspecify,
                        macromodule, strength, xnor, xor, pg 4.
                      - Only lists 4 compiler directives, omits `timescale
                        (among others), pp 3-4
                      - Lists only three $system tasks ($time, $finish,
                        $setuphold scattered throughout examples).
                      - Typo: Combinational 3:1 MUX UDP example mis-labeled
                        as "inverted out", pg 7.
                      - Other minor omissions.
       Recommendation: The Quick Reference would be enhanced by a
       fine-print keyword and key-topic index inside the back cover.
       (Note from Rajeev Madhavan: many of the above issues will be
       addressed in the pending next revision)
       (Submitted by Cliff Cummings)

(R5)  "VERILOG HDL 2.0 LANGUAGE REFERENCE GUIDE", by Sutherland HDL
       Consulting - Nov 1994

       Sutherland HDL Consulting, 2417 Redwood Ct.
       Longmont, CO 80503
       Phone: [phone]
       FAX:   [phone] (same number)
       E-mail: [e-mail] (Stuart Sutherland)

       Sutherland Verilog Quick Reference
       ==================================
       Advantages:    - 24 pages.
                      - Intended to be a quick reference language
                        syntax guide.
                      - Lists 16 compiler directives including `timescale.
                      - Lists ~25 $system tasks, including 7
                        specify-block timing checks, $monitor,
                        $display, $stop, file-I/O tasks.
                      - Based on March 1993 - OVI 2.0 Spec (includes
                        some newer Verilog constructs)
       Disadvantages: - 44 Table of Content entries. No index.
                      - No Synthesis section (but not necessarily
                        useful to, or needed by all Verilog users).
       Recommendation: The Quick Reference would be enhanced by a
       fine-print keyword and key-topic index inside the back cover.
       (Submitted by Cliff Cummings)

(R6)  "SUCCESSFUL ASIC DESIGN THE FIRST TIME THROUGH", by
      J. Huber and M. Rosneck.
      ISBN 0-442-00312-9
      Mark Rosneck's e-mail address: [e-mail]

      Van Nostrand Reinhold
      Mail Order Department
      P.O. Box 668
      Florence, KY 41022-0668
      1-800-354-9706

      (The material in this book is) not limited to Verilog, but
      it does give a good, practical introduction to the processes
      and tradeoffs involved in designing an ASIC. (Submitted by
      Daniel Sears)

(R7)   Feature Columns by L. Saunders and Y. Trivedi, regular columns
       in Integrated System Design Magazine (formerly ASIC & EDA Magazine)

       Integrated System Design
       5150 El Camino Real Ste D31,
       Los Altos, CA 94022-9873

       Free subscription for qualified readers:
       To qualify by phone: (800) 643-READ (7323)
       Subscribe onlnie to http://www.netline.com/isd
       Interactive online subscription number: telnet asic.com 2110

       Monthly (occasionally missed) column covering Verilog and
       VHDL modeling topics. Well worth reading. (Submitted by Cliff
       Cummings)

(R8)  "THE VERILOG HARDWARE DESCRIPTION LANGUAGE, Second Edition",
       by D. Thomas and P. Moorby.
       ISBN 0-7923-9523-9

       :        |  :
       Kluwer Academic Publishing Co.   |  Kluwer Academic Publishers Group
       Order Department                 |  Order Department
       P.O. Box 358                     |  P.O. Box 322
       Hingham, MA 02018                |  3300 AH Dordrecht
                                        |  The Netherlands
       Phone: [phone]              |  Phone: [phone]
       FAX:   [phone]              |  FAX:   [phone]
       e-mail: [e-mail]     |  e-mail: [e-mail]

       This fully revised Second Edition features:
       -- new and more detailed examples
       -- a more formal presentation of the language
       -- comprehensive cross-references for each section
       -- a disk containing a DOS version of the VeriWell(tm)
          Verilog simulator as well as examples from the book.
          The simulator can be used to solve the examples.
          (Submitted by Eric Maki of Kluwer Academic Publishers)

OPEN VERILOG INTERNATIONAL (OVI) REFERENCE MATERIALS
====================================================
      OVI is the organization charged with Verilog standardization
      and language enhancements. OVI is currently pursuing Verilog
      IEEE and ISO standardization.

      For the following publications contact Lynn Horobin at the
      OVI office.

      Open Verilog International
      Lynn Horobin
      15466 Los Gatos Blvd., Suite 109-071
      Los Gatos, CA 95032
      Phone: [phone] -- FAX: [phone]
      e-mail: [e-mail]

(O1)  "LANGUAGE REFERENCE MANUAL" (LRM), Version 2.0*
      - $100 per copy, plus local sales tax

(O2)  "PROGRAMMING LANGUAGE INTERFACE" (PLI), Version 2.0*
      - $150 per copy, plus local sales tax

(O3)  "STANDARD DELAY FILE FORMAT MANUAL" (SDF), Version 2.0*
      - $100 per copy, plus local sales tax

(O4)  "PROCEEDINGS FROM '92 OVI USER GROUP MEETING",


(O5)  "PROCEEDINGS FROM '93 INT'L VERILOG HDL CONF.",


(O6)  "1994 OVI DIRECTORY OF SUPPORT FOR VERILOG HDL",
      - No charge

(O7)  "OPENEXCHANGE", monthly OVI publication,
      - No charge

(O8)  "OPENEXCHANGE" (Back Issues), monthly OVI publication,
      - $5 per copy

(O9)  "PROCEEDINGS FROM '94 INT'L VERILOG HDL CONF.",
      - $50 per copy, plus local sales tax

* Versions 1.0 of the LRM, PLI and SDF are still available.

VENDOR REFERENCE MATERIALS (Have requested an update from Cadence)
==========================

(V1)  "VERILOG-XL REFERENCE MANUAL", 3 Volumes, Version 1.6c June
       1993 (Contact your local Cadence sales office)

       - A good set of reference manuals with examples, after you
         have learned Verilog, or if you have a specific question.
         (Submitted by Cliff Cummings)

(V2)  "GRAPHICAL OUTPUT FOR THE VERILOG PRODUCT FAMILY REFERENCE
       MANUAL", Version 1.1f September 1989, Version 1.1f September
       1989 Release notes, Version 1.2b November 1990 Release notes.
       (Contact your local Cadence sales office)

       - Explains the commands that are used with the GR_WAVES graphics
         package. (Submitted by Cliff Cummings)

(V3)  "CADENCE VERILOG-XL TRAINING COURSE", Version 3.3, August 1991.
       (Contact your local Cadence sales office)

       - Reasonable training materials.
       - A number of the training slides contain examples with minor
         syntax errors and other examples that must be corrected before
         they will run (it is obvious that not all of the training
         examples were tested).
       - The training course notebook does not have an index and really
         needs one. (Submitted by Cliff Cummings)

(V4)  "CADENCE VERILOG TRAINING COURSE LABS & SOLUTIONS", Release 3.3.a
       April 14, 1992. (Contact your local Cadence sales office)

       - No index, but a good set of labs to accompany the training
         course. (Submitted by Cliff Cummings)

(V5)  "VERILOG HDL TRAINING COURSE", by Sutherland HDL Consulting

       Sutherland HDL Consulting, 2417 Redwood Ct.
       Longmont, CO 80503
       Phone: [phone]
       FAX:   [phone] (same number)
       E-mail: [e-mail] (Stuart Sutherland)

REF_FAQ REFERENCE-INCLUSION POLICY
==================================
        If anyone is aware of other Verilog reference materials, please
        forward the information to Cliff Cummings -
        [e-mail]

        REF_FAQ Reference-Inclusion Policy:

        (1) Materials should be released and publicly available
            (pre-release announcements will no longer be included in
            REF_FAQ).

        (2) Publisher/Vendor pricing information will be added only upon
            Publisher/Vendor request (exception: OVI published prices
            have been noted).

        (3) Reviews, if added, will be credited to the reviewer.

        (4) Magazines will only be listed if they carry a regular
            Verilog-related column (such as Integrated System
            Design(R7)).

        (5) These policies are subject to suggestions and change!

--
Steve Phillips                [phone]                   [e-mail]